Electric switch.



F. BARR.

ELECTRIC SWITCH.

APPLICATION FILED DEC. 12, 1912.

1,097,208, Patented May 19, 1914.

Fig. is 23 22 IN VE/V TOR Q Free/e292 r r,

FBEDERIC BARB, OF NEW YORK, N. Y.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented May 19, 1914.

Application filed December 12,. 1912. Serial No. 736,366.

To all whom it mag concern Be it known that I, FREDERIG BARR a citizen of the United States of America, and residing at New York, in the county of Kings and State of New York, have invented new and useful Improvements in Electric Switches, of which the following is a specification.

My invention relates particularly to what are commonly termed pullswitches and the two forms herein shown are specially applicable to what are commonlytermed lamp clusters.

One object is to provide a simple" form and arrangement of pull switch mechanism and supporting base which can be ccono1ni-- 'cally manufactured and readily assembled or disassembled and yet in which the parts are properly insulated and protected from each other so that there is no likelihood of short circuiting or grounding.

Briefly considered, the invention contemplates an insulating base having a recess in its upper surface to receive the insulating block carrying the pull switch mechanism. The contacts for the lamps are secured to the base. One of the circuit tcrminals'is secured to the insulating base and the other is secured to the insulating block. The con: tacts for the lamps are surrounded by a shell lined with insulation which in conjunction with the insulating base and the insuluting block form an inclosing chamber for the switch mechanism. The operating cord or chain as it is customarily called passes section being taken out through insulating members which form an insulating passage.

Figure 1, is a vertical section of one form of mechanism embodying ,my'invcntion, the he plane of the line X X of Fig. 2. Fig. 2, is a plan view-of the same. Fig. 3, is an inside view of the insulating block and the switch contacts carried thereby. Fig. is a plan viewof the same. Fig. 5, is a vertical, section of switch member.

another form of my invention, the section being taken on the plane of the line Y Y of Fig. 6. Fig. 6, is a plan view of the same. Fig. 7, is a detail view of the rotatable Fig. 8, is a detail view of the rotating carrier of the switch member. Fig. 9, is a detail view of the operating ratchet member.

The base 1 is formed of porcelain or other suitable insulating materialsuch as fiber, etc. The screw socket contacts 2 for the lamps (not shown) are carried by a frame 3 which is secured to the base for instance, by screws such as 4, 4 and 4. The center lamp contacts such as 5, 5 are car-. ried by a frame 8 which is secured to the insulating base for instance by means of screws such as 7, 7 and 7.

The insulating is provided with a recess to receive the insulating block 8 which carries the switch contacts 9 and 10' and the brackets 11 and 12 The brackets and contacts are secured tethc insulating blockfor instance by means of screws 13 and 14. The brackets are provided with wings l5 and 16 bent at right angles to and laterally to'the switch contacts. this is provided with a. binding screw 1? which. thus in conjunction with it forms one of the circuit terminals. The other binding screw 18 is screwed into a plate 19 which in conjunction with it terms the other -rcuit terminal which is secured to the ir ins; base 1 by means of the screw 7".

216 and thus tin iiuting block 8 are scoured to the insulating base by means of the screw 4-. r

The two-armed switch member- 20 1 is Imounted in one face of the rotary insulating lcarrier 21 on the spindle 22 which is rigidly secured to the insulating block 8. The ratchet member also mounteo on the spindle 22 and pressed toward the carriergl by a spring 24 which bears against the nut 25 screwed on to the outer end of the spindle. The switch contacts 9 and 10 are HI- ranged inclined as the segments of an annular ring and have the inclined insulating steps 26 and 27 between them. The spring 24 not only presses the ratchet. 23 against the-carrier .21 and thus presses the switch member contac against the switch contacts 9 and 10 and She inclined faces 26 an'd 27 but it also tends to rotate the ratchet member 23 clockwise so that the ratchet member engages the shoulder '28 of the insulating block which acts as a back stop. The'opcrating cord or chain 29 is secured to the ratchet member 23 in a suitablemanner to adapt it to pull down the ratchet 23 and thus rotate the switch member anti-clock-. wise. The upper part of the insulating block 8 is provided with a flange 30'which extends over the spindle, the switch contacts and the operating members and closes the opening in the insulating base. A guard flange 31 is also provided around'the lower nrackct 12 and its wing edge of theinsulating block Soto keep the chain away from the switch contacts. I also provide one or more insulating members, tubes or bushings such as 32, 33 and 34 to form an insulating guide passage for the operating chain. The member 32 is secured to the center lamp contact frame '6. The member 33 is secured to the contact frame 3 and the member 34 is secured to the shell 35 which has an insulating lining 36 which incloses; and insulates all the interior mechanism: The electriccircu-it may be traced from the binding screw 18 through the plate 19, screw 7' into the center lamp contact frame 6 and from the binding screw 17, wing and terminal bracket 11, contact 9, switch member 20, contact 10, bracket 12, wing 16 and screw 4 to the lamp screw socket bracket 3. The insulating base is preferably'recessed to receive the circuit terminals as is shown inFig. 2, while the insulating block 8 and its flange fill the central opening and cover the switch mechamsm.

In the form shown in Figs. 5 and 6 the insulating block 40 carries the bracket 41 for the screw lamp screw shells'42, the bracket being secured to the base by screws 43. One of these screws also secures the circuit terminal plate .44. The center ring 45 secured to the insulating base has center contacts 46 for the lamps. The switch mechanism proper is carried by an insulating block which fills the opening or recess in the insulating base 40. The spindle 47 is supported between the side flanges 48.and 49 and covered by the top flange 50. One switch contact 51 is connected by a screw 52 to the circuit. terminal 53. The other switch contact 54 issecured by a screw 55 to a member 56 which passes down through the center ring 45 and is held in place by a nut 57. The electric circuit may be traced from the circuit terminal 44 through the screw 43 to the bracket 41 and lamp screw shell contacts 42, and from the circuit terminal .53 through the screw 52, switch contact '51,

rotatable switch member (as shown in Fig.-

7), switch contact 54, screw 55 and member 56 to the center ring 45 and its center contacts 4-6. In this construction the guide passage for the chain is formed by the insulating flange 58, insulating ring 59 and insulating tube; 60, and all the parts are inclosed between the insulating base 40 and the cas ing or shell 61.

That I claim is.* 4

.1. In an electric switch, an insulating base having a central recess opening on its upper face, an insulating block femovably fitting in said recess and provided with an insulating flange closing the recess when the block is seated therein, pull switch mechanism carried by said block beneath the said insulating'fiange, lamp contacts carried by said insulating base, a casing surrounding said lamp contacts and having a central passage and insulating members forming an insulating guide passage for the pull chain and insulating said chain respectively from said lamp contacts and said casing.

2. In an electric switch, an insulating base having a central recess opening on its upper face, an insulatin block removably fitting in said recess, pu I switch mechanism carried by said block, lamp contacts carried by said insulating base, a casing surrounding said lamp contacts and having a central passage and insulating members forming an insulating guide passage for the pull chain and insulating said chain respectively from said lamp contacts and said casing, acircuit terminal carried by said insulating block and a second circuit terminal carried by said insulating base.

3. In an electric switch, an insulating base having a central recess'opening at its upper face, an insulating block removably .fitting in said recess, pull switch mechanlsm carried by said block, lamp contacts carried by said insulating base, a casing surrounding. said lamp contacts and having a central chain passage, said block having an insulating flange over said switch mechanism and closing the upper part of said recess and a chain guided in said central passage.

4. In an electric switch, an insulating base having a central recess opening at its upper face, an insulating block removably fitting in said recess, pull switch mechanism carried by said block, lamp contacts carried by said insulating base, a casing surrounding said lamp contacts and having a central chain passage, a circuit terminal carried b said insulating block and asecond circuit ter-. minal carried by said insulating base.

5. In a pull switch, a receptacle open at the top and having an insulated chain uide passage at the bottom, an insulating lock fitting in said receptacle, switch mechanism carried by said block, provided with outstanding brackets, one of said brackets forming a circuit terminal, lampcontacts in the receptacle, means connecting one of said lamp contacts with the other one of said outstanding brackets and the other of said lamp contacts provided with a second circuit terminal, a pull chain extending through said passage, said block closing the top opening in Saar receptacle.

6. In a pull switch, -a receptacle having a recess at the top and having a central chain guide at the bottom, an insulating block removably secured in said recess, lamp con tact frames in the receptacle and switch mechanism carried by said block and including switch contacts, brackets diverging from said switch contacts, a circuit terminal screw in one bracket at the upper end of said receptacle, a screw connecting-the other chain guide bracket with one lamp contact frame and a second circuit terminal screw carried by said receptacle and connected with the other lamp contact frame. l 7. In a pull switch, an insulating base having a recess, an insulating block fitting said recess,

'ing a recess, lamp contacts carried by said base, an insulating block removably fitting the recess in the base, switch mechanism can i-ied by the block, provided with outstanding brackets, one of said brackets forming a circuit terminal, means detachably connecting the other bracket with one of the lamp terminals on the base, a chain guide and a pull chain connected with the switch mechanism and extending through said chain guide.

l FREDERIC BARR.

\Vitnesses Roar. S. ALLYN,

J. CLYDE RIPLEY.

switch mechanism carried by said block and including contacts. central at the bottom of said base, a l chain connected to said switch mechanism l and depending through said chain guide and insulating guard flanges projecting from said block between said guide and said contacts. l 8. In a pull switch, an insulating base hav- 1 

